LOCATION.--Lat 39°32'29.3", long 76°19'48.4", Harford County, MD, Hydrologic Unit 02060003, 
   on right bank 30 ft downstream from bridge on State Highway 22, 1.0 mi east of Bel Air,
   and 8.5 mi upstream from mouth.
DRAINAGE AREA.--8.52 mi2.
PERIOD OF RECORD.--June 1944 to April 1951, July 1955 to September 1970. Annual maximum, water years 1971-72.
   June 1999 to current year.
REVISIONS HISTORY.--WDR-US-2010: 1999-2001, 2003-2009 (P), 1999, 2003, 2005-06, 2008, 
   https://waterdata.usgs.gov/nwis/dv/?site_no=01581500: 2014.

   The date of Measurement 238S was revised to Aug. 1, 1971. The revision was made on May 4, 2021.
 
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 250.08 ft above North American Vertical
   Datum of 1988.
REMARKS.--U.S. Geological Survey satellite data-collection platform at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 5,600 ft³/s, Aug. 20, 2015, gage height, 11.15 ft;
   minimum discharge, 0 ft³/s, no flow, Sept. 8-10, 1966.
COOPERATION.--Funding for the operation of this station is provided by the Harford County Department of Public 
   Works, and the U.S. Geological Survey.